2068-check-whether-two-strings-are-almost-equivalent.java

class Solution {
    public boolean checkAlmostEquivalent(String word1, String word2) {
        
        int [] freq1=new int[26];
        int [] freq2=new int[26];
        
        for(int i=0;i<word1.length();i++){
            freq1[word1.charAt(i)-'a']++;
        }
        
        for(int i=0;i<word2.length();i++){
            freq2[word2.charAt(i)-'a']++;
        }
        
        for(int i=0;i<26;i++){
            if(Math.abs(freq1[i]-freq2[i]) >3)
           return false;
        }
        
        return true;
        
    }
}